Magnetic Recording Tape Composition for Smooth, Low-Friction Surfaces
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Solution Overview
Problem
Reducing the recesses and projections on the surface of the magnetic layer in tape-shaped magnetic recording media can lead to increased friction between the magnetic tape and the head unit, compromising electromagnetic conversion characteristics.
Innovation Solution
A tape-shaped magnetic recording medium with a magnetic layer containing chlorine and nitrogen atoms, an average thickness of 5.30 μm or less, and a protruding peak height of 2.10 nm or less, along with a cartridge design that includes a magnetic recording medium with specific atomic concentration ratios and surface characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the recesses and projections on the surface of the magnetic layer are reduced to smooth the surface, then electromagnetic conversion characteristics are improved, but friction between the magnetic tape and the head unit increases
Solution Approach 1:
The invention changes the chemical composition parameters of the magnetic layer by incorporating specific elements (Cl, N, B, Si, C) at controlled atomic concentrations. This chemical modification allows the surface to maintain smoothness (Rpk ≤ 2.10 nm) while preventing excessive friction through the tribological properties provided by these elements, particularly chlorine and nitrogen which can form low-friction surface compounds.
Solution Approach 2:
The magnetic layer is designed as a composite material containing multiple elements (Cl, N, B, Si, C) in addition to the base magnetic materials. This composite structure enables simultaneous achievement of surface smoothness and low friction by combining the electromagnetic properties of magnetic particles with the tribological benefits of chlorine, nitrogen, and other lubricating elements.
2Productivity
If the average thickness of the magnetic recording medium is reduced to 5.30 μm or less, then recording density is improved, but mechanical strength decreases
Solution Approach 1:
The magnetic recording medium employs a composite structure with a base layer and a magnetic layer containing specific elements (Cl, N, B, Si, C). This composite design allows the overall thickness to be reduced to 5.30 μm or less for increased recording density while the specific compositional elements provide enhanced mechanical properties and surface characteristics that compensate for the reduced thickness.
Solution Approach 2:
The invention modifies the compositional parameters of the magnetic layer by incorporating elements at specific atomic concentrations (Cl: 0.01-10 at%, N: 0.01-10 at%, etc.). These compositional changes enhance the material's mechanical strength and surface properties, enabling the use of thinner media (≤5.30 μm) without sacrificing structural integrity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution achieves favorable electromagnetic conversion characteristics while suppressing friction, enhancing the performance and reliability of the magnetic recording medium.
Implementation Method 1
In the tape-shaped magnetic recording media, in order to achieve favorable recording and reproduction characteristics (electromagnetic conversion characteristics), it is desired to reduce the height of recesses and projections on the surface of the magnetic layer
Data Source
AI summary
A magnetic recording medium is a tape-shaped magnetic recording medium and includes: a base; and a magnetic layer. An average thickness of the magnetic recording medium is 5.30 μm or less. The magnetic layer contains a chlorine atom and a nitrogen atom, an atomic concentration ratio (A2/A1) of a maximum chlorine atomic concentration A1 obtained by measuring a chlorine atomic concentration of the magnetic layer in a thickness direction of the magnetic layer and a maximum nitrogen atomic concentration A2 obtained by measuring a nitrogen atomic concentration of the magnetic layer in the thickness direction of the magnetic layer is 0.50 or more and 0.75 or less. An average value of a protruding peak height Rpk of a surface of the magnetic layer is 2.10 nm or less.